ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hui Peng,Xinxin Wang,Ye Tian,Bingsuo Zou,Fan Yang,Tao Huang,Chengyu Peng,Shangfei Yao,Zongmian Yu,Qingrong Yao,Guanghui Rao,Jianping Wang
Zero-dimensional lead-free organic–inorganic hybrid metal halides have drawn attention as a result of their local metal ion confinement structure and photoelectric properties. Herein, a lead-free compound of (Gua)3Cu2I5 (Gua = guanidine) with a different metal ion confinement has been discovered, which possesses a unique [Cu2I5]3– face-sharing tetrahedral dimer structure. First-principles calculation demonstrates the inherent nature of a direct band gap for (Gua)3Cu2I5, and its band gap of ∼2.98 eV was determined by experiments. Worthy of note is that (Gua)3Cu2I5 exhibits a highly efficient cool-white emission peaking at 481 nm, a full-width at half-maximum of 125 nm, a large Stokes shift, and a photoluminescence quantum efficiency of 96%, originating from self-trapped exciton emission. More importantly, (Gua)3Cu2I5 single crystals have a reversible thermoinduced luminescence characteristic due to a structural transition scaled by the electron–phonon coupling coefficients, which can be converted back and forth between cool-white and yellow color emission by heating or cooling treatment within a short time. In brief, as-synthesized (Gua)3Cu2I5 shows great potential for application both in single-component white solid-state lighting and sensitive temperature scaling.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guolun Zhang,Chengzhi Yang,Qilin Wei,Jiangjie Long,Xiaodong Shen,Yijun Chen,Bao Ke,Weizheng Liang,Xianci Zhong,Bingsuo Zou
In recent years, low-dimensional organic–inorganic hybrid metal halides (OIHMHs) have shown excellent photophysical properties due to their quantum structure, adjustable energy levels, and energy transfer between inorganic and organic components, which have attracted extensive attention from researchers. Herein, we synthesize a zero-dimensional (0D) OIHMH, Sb3+:(Gua)3InCl6, by introducing Sb3+ into (Gua)3InCl6, which undergoes a significant enhancement of the emission peak at 580 nm with the photoluminescence quantum yield (PLQY) boosted from 17.86 to 95.72% when excited at 340 nm. This boost in photoluminescence of the doped sample was studied by combining ultrafast femtosecond transient absorption, temperature-dependent photoluminescence (PL) spectra, and density functional theory (DFT) calculation, revealing the process of self-trapped exciton (STE) recombination to emit light at both Sb and In sites in this 0D structure simultaneously. This material with the lowest dark STE level at the In site for emission in the undoped sample can amazingly yield very strong emission in the doped sample, which has never been observed before. Finally, we tested its application in a photoelectric device. This work not only helps to gain a deeper understanding of the formation of STEs in In-based halides but also plays a certain guiding role in the design of new luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 14
·2407401
·
IF 14.1
Qianyi Li,Dongyang Li,Zhiqi Li,Qiong Liang,Patrick W. K. Fong,Yu Han,Kuan Liu,Jiangsheng Yu,Peng Bai,Tao Zhu,Yang Bai,Guang Yang,Zhiwei Ren,Gang Li
Hybrid metal halide perovskite solar cells (PSCs) are emerging as highly competitive next-generation photovoltaics due to their excellent performance and low production cost. However, the construction of high-efficiency PSCs typically requires an inert nitrogen environment within a glove box, inadvertently increasing manufacturing costs and hindering the transition from lab-scale to industrial-scale production. In this work, an air ambient fabrication of pure α-phase FAPbI 3 PSCs with high-efficiency and stability, utilizing a dual-functional engineering strategy assisted by 3-Guanidinopropionicacid (3-GuA) is reported. 3-GuA assists in managing excess PbI 2 and promotes the formation of high-quality FAPbI 3 films via intermolecular exchange. Simultaneously, the existence of 3-GuA minimizes the defects and stabilizes the resulting perovskite films. As a result, the ambient-air fabricated PSCs achieve a power conversion efficiency (PCE) of 24.2% with negligible hysteresis and excellent stability. Additionally, these devices demonstrate superior reproducibility, offering valuable guidance for future advancements in this technology.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
·
2021
·
IF 1.455
WanFu Wang,Qiang Xu
Recently, halide hybrid perovskites have emerged as an attractive material for radiation detection due to their high atomic numbers and resistivity, large μ
τ product ( μ is the carrier mobility ; τ is the carrier lifetime). However, the sensitivity and stability of perovskite X-ray detectors were limited by ion migration in the perovskites. In this paper, the guanidinium ionic (Gua + ) doped MAPbI 3 single crystals were successfully obtained with the solution-processed method. (Gua) 0.06 (MA) 0.94 PbI 3 single crystal shows an activation energy of 589 meV. The X-ray detector with Au/(Gua) 0.06 (MA) 0.94 PbI 3 /Ga structural exhibited a high X-ray sensitivity of 2903 μ C Gy air − 1 cm −2 and a low limit of detection of 7.2 nGy air s − 1 . This work shows that a certain amount of Gua + doping into MAPbI 3 could inhibit the ion migration, and significantly improve the X-ray detection performance.
研究领域:
材料科学
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Jie Gao,Zhenzhen Weng,Ze Zhang,Yuanyuan Liu,Zikang Liu,Xinyue Pu,Simin Yu,Yanhua Zhong,Danmeng Bai,Hongbo Xin,Xiaolei Wang
Androgenetic alopecia (AGA) is a prevalent systemic disease caused by diverse factors, for which effective treatments are currently limited. Herein, the oleogel (OG) containing copper-curcumin (CuR) nanoparticles is developed, designated as CuRG, which is also combined with traditional naturopathic scraping (Gua Sha, SCR) as a multifunctional therapy for AGA. With the assistance of lipophilic OG and SCR, CuR can efficaciously penetrate the epidermal and dermal regions where most hair follicles (HFs) reside, thereby releasing curcumin (CR) and copper ions (Cu 2+ ) subcutaneously to facilitate hair regeneration. Concomitantly, the mechanical stimulation induced by SCR promotes the formation of new blood vessels, which is conducive to reshaping the microenvironment of HFs. This study validates that the combination of CuRG and SCR is capable of systematically interfering with different pathological processes, ranging from improvement of perifollicular microenvironment (oxidative stress and insufficient vascularization), regulation of inflammatory responses to degradation of androgen receptor (AR), thus potentiating hair growth. Compared with minoxidil, a widely used clinical drug for AGA therapy, the designed synergistic system displays augmented hair regeneration in the AGA mouse model. This article is protected by copyright. All rights reserved
研究领域:
皮肤科
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纳米技术
·
传统医学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2025
·
IF 2.6
De-Huan Yang,Li-Lin Lin,Zhang-Feng Tang,Zengping Chen,Yao Chen,Tong Wang,Ruqin Yu
Lu'an Gua Pian tea (LAGP) is a traditional historical tea and one of the top ten famous teas in China. The price of LAGP from the same place of origin with different harvest time varies greatly in the market, among which the LAGP before the Qingming Festival (between April 4th and 6th every year) is regarded as a precious product. To accurately determine the harvest time of LAGP, especially around Qingming, HPLC-DAD combined with three different data analysis strategies (including targeted components analysis, non-targeted components analysis, and non-targeted fingerprint analysis) was evaluated and compared. Four machine learning algorithms are used to build the corresponding classification models, among which principal component analysis coupled with linear discriminant analysis (PCA-LDA), partial least squares discriminant analysis (PLS-DA) and K-nearest neighbors (K-NN) achieved more than 95% classification accuracy. In addition, the non-targeted component analysis can classify LAGP picking time to a much smaller extent with an accuracy of 100% for PLS-DA. The advantages and disadvantages of three data analysis strategies were compared. Regardless of the data analysis strategy used, the final classification accuracy was satisfactory. The corresponding data analysis strategy can be selected according to the specific experimental purpose. This work provides a variety of alternative solutions based on HPLC-DAD for identifying the picking time of Lu'an Gua Pian.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Qiwen Du,Weichen Jia,Jingyu Dai,Chao Du,Aiyun Shao,Rongmin Zhang,Yuefei Ji
Natural organic matter (NOM) contains a large number of aromatic ketones and quinones, which can produce reactive oxygen species (ROS), such as 1 O 2 and HO·, through photosensitization. These ROS play important roles in the attenuation of organic pollutants in sunlit surface water. The NOM components fractionated with XAD-8 resin at different pH influence the photo-generation of ROS, which may be related to the degree of dissociation of functional groups. In this study, probe chemicals were used to investigate the effect of dissociation degree (p K a ) of NOM model compounds on ROS production under 254 nm UV irradiation. Experimental results showed that six model compounds with similar molecular weights and structures but different p K a values have different ROS production abilities in a pH 7.0 reaction system. The ability for DHB 2,5 (2.97), DHB 3,4 (4.48), and GUA (9.99) to photo-generate 1 O 2 increased with increasing dissociation. The ability for DHB 3,4 and GUA to photo-generate HO· followed the same trend. The correlation between NOM dissociation constant and ROS generation is preliminary established, which explains the influence of functional groups. Our results may provide some basic information for understanding the correlation between NOM structural features and ROS generation.
研究领域:
环境化学
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光化学
·
水处理
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Medicine Reports
·
2014
·Vol. 10
·期 1
·248-254
·
IF 1.484
Xianwen Chen,Huang Li,Mingqing Huang,Mei Huang,Wei Xu,Kedan Chu,Lidian Chen,Yuqin Zhang
Gua Lou Gui Zhi decotion (GLGZD) has been reported to be an effective treatment for post‑apoplectic limb spasm in the clinic. The present study aimed to investigate whether GLGZD had an affect on cerebral injuries induced by middle cerebral artery occlusion (MCAO) in rats and its possible mechanism. High‑performance liquid chromatography was performed to analyze GLGZD. Furthermore, a model was established to assess the efficacy of GLGZD. Neurological defect scores and screen tests were analyzed. Brain ischemic infarct volume was measured using 2,3,5‑triphenyl tetrazolium chloride staining and glutamic acid (Glu), aspartic acid (Asp) and glycine (Gly) levels in the cerebrospinal fluid were measured using the Hitachi automatic amino acid analyzer. Immunohistochemistry was performed to determine the expression of the α‑amino‑3‑hydroxy‑5‑methyl‑4‑isoxazole‑propionic acid (AMPA) and N‑methyl‑D‑aspartic acid (NMDA) glutamate receptors, and to analyze histopathological change. GLGZD was found to improve neurological performance and reduce infarct volumes in MCAO rats. In addition, GLGZD was observed to enhance motor performance, which was assessed using the screen test. Furthermore, GLGZD was found to reduce Glu, Asp and Gly levels in the cerebrospinal fluid and downregulate the protein expression of the AMPA and NMDA glutamate receptors. Thus, it was demonstrated that GLGZD may exert neuroprotective effects through the modulation of excitatory amino acids, and AMPA and NMDA receptor expression.
研究领域:
神经科学
·
中药学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）